After rubbing shoulders with 50 Cent in the viral video for Jeremih’s “Down on Me,” Internet phenom Keenan Cahill hits the studio with Grammy-winning DJ David Guetta. Performing a megamix of the French producer’s biggest hits, the self-proclaimed “fu**ing YouTube sensation” lip-syncs to the Black Eyed Peas’ “I Gotta Feeling,” Kelly Rowland’s “When Love Takes Over,” and Rihanna’s “Who’s That Chick?” as Guetta joins him in the studio. Bonus points given for his emphatic facial expressions.